socket-util.h: include string.h

Fix the following compile error:
src/basic/socket-util.h:187:30: error: implicit declaration of function 'strnlen'; did you mean 'strlen'? [-Werror=implicit-function-declaration]

diff --git a/src/basic/socket-util.h b/src/basic/socket-util.h
index 6920fd99ba5d4ac27a67eae8ebeb607777e42a38..36ec422f2c09103d458e7fc6d1f09fe5425b66f6 100644 (file)
--- a/src/basic/socket-util.h
+++ b/src/basic/socket-util.h
@@ -9,6 +9,7 @@
 #include <netinet/in.h>
 #include <stdbool.h>
 #include <stddef.h>
+#include <string.h>
 #include <sys/socket.h>
 #include <sys/types.h>
 #include <sys/un.h>